The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1999
Filed:
Sep. 20, 1996
Stephen W McKeever, Stillwater, OK (US);
Mark S Akselrod, Stillwater, OK (US);
Brian G Markey, Roskilde, DK;
The Board of Regents of Oklahoma State University, Stillwater, OK (US);
Abstract
A bimodal method for determining an unknown absorbed dose of radiation. An irradiated material is illuminated with ultraviolet or visible light and the luminescence which is emitted from the material is detected. The illuminating light is pulsed, with pulse widths varying from 1 ns to 500 ms. The luminescence emission from dosimetric traps is monitored after a delay following the end of the illumination pulse. The integrated luminescence signal is related to the initial absorbed dose of radiation and thus may be used to calculate the unknown absorbed dose after calibration. In a first mode, the material is completely detrapped--that is, all the dosimetric traps are emptied by the illumination beam. In a second mode the number of illumination pulses, each being followed by the time delay and by periods during which the luminescence signal is detected, is selected such that only a portion of the radiation-induced luminescence from the material is extracted.